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[Filesystems] Add udev rule to automatically enable queue priority if device supports it

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This commit is contained in:
Antoine Viallon 2022-02-08 12:07:11 +01:00
parent 4c1073c8aa
commit 825a3d5b65
Signed by: aviallon
GPG key ID: 186FC35EDEB25716
1 changed files with 12 additions and 3 deletions
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15
filesystems.nix
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@ -30,6 +30,12 @@ in
description = "Automatically set NVMe IO queue algorithm";
type = ioSchedType;
};
queuePriority = mkOption {
default = true;
example = false;
description = "Automatically enable ncq_prio if it is supported by the SATA device.\nIt may improve latency.";
type = types.bool;
};
};
config = mkIf cfg.enable {
@ -39,13 +45,16 @@ in
udevRules = concatStringsSep "\n" (
concatLists [
(optional (!(builtins.isNull cfg.hddScheduler))
''ACTION=="add|change" SUBSYSTEM=="block", KERNEL=="sd[a-z]*", ATTR{queue/rotational}=="1", ATTR{queue/scheduler}!="none", ATTR{queue/scheduler}="${cfg.hddScheduler}"''
''ACTION=="add|change", SUBSYSTEM=="block", KERNEL=="sd[a-z]*", ATTR{queue/rotational}=="1", ATTR{queue/scheduler}!="none", ATTR{queue/scheduler}="${cfg.hddScheduler}"''
)
(optional (!(builtins.isNull cfg.slowFlashScheduler))
''ACTION=="add|change" SUBSYSTEM=="block", KERNEL=="sd[a-z]*|nvme[0-9]*n[0-9]*|mmcblk[0-9]*", ATTR{queue/rotational}=="0", ATTR{queue/scheduler}="${cfg.slowFlashScheduler}"''
''ACTION=="add|change", SUBSYSTEM=="block", KERNEL=="sd[a-z]*|nvme[0-9]*n[0-9]*|mmcblk[0-9]*", ATTR{queue/rotational}=="0", ATTR{queue/scheduler}="${cfg.slowFlashScheduler}"''
)
(optional (!(builtins.isNull cfg.nvmeScheduler))
''ACTION=="add|change" SUBSYSTEM=="block", KERNEL=="nvme[0-9]*n[0-9]*", ATTR{queue/scheduler}="${cfg.nvmeScheduler}"''
''ACTION=="add|change", SUBSYSTEM=="block", KERNEL=="nvme[0-9]*n[0-9]*", ATTR{queue/scheduler}="${cfg.nvmeScheduler}"''
)
(optional cfg.queuePriority
''ACTION=="add|change", SUBSYSTEM=="block", KERNEL=="sd[a-z]*", ATTR{device/ncq_prio_supported}=="1", ATTR{device/ncq_prio_enable}="1"''
)
]
);